It was the NVidia driver for me what fixed it in the end. I had the latest one at the time but this must have had a bug of some sorts in it.. Make sure you've got this driver version installed, 30.0.15.1179, and it should work fine.
I had the same issues for a couple of weeks and no joy in fixes, until one morning when windows asked my to update my Nvidia driver again, and it worked fine after that.
That being said, I could install all of the latest builds of the 3.1 version of the software fine with the bugged driver, it was only the 3.2 builds that didn't work for me.